释义 |
mass point 基本例句 质点 A particle has no extent so that its position is a point.质点没有广度因此它的位置是一个点。 One instance of simple harmonic motion is that of the projection on any diametre of a point which describes a circular path with uniform angular velocity.当一质点以匀角速度作圆周运动时,则它在任意直径上的投影的运动便是简谐运动的一例。 |